Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME Observations
The variation in tropospheric ozone over East Asia was analyzed using tropospheric column ozone data measured by the Global Ozone Monitoring Experiment (GOME) satellite. An empirical orthogonal function (EOF) analysis was carried out to derive the dominant modes of the variation in the tropospheric...
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Series: | Advances in Meteorology |
Online Access: | http://dx.doi.org/10.1155/2015/879578 |
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doaj-e8d7ca0756ff4e569456e0239de195fb2020-11-25T02:29:36ZengHindawi LimitedAdvances in Meteorology1687-93091687-93172015-01-01201510.1155/2015/879578879578Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME ObservationsYi Liu0Yuli Zhang1Yong Wang2Chuanxi Liu3Zhaonan Cai4Paul Konopka5Rolf Müller6Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaInstitute of Energy and Climate Research: Stratosphere (IEK-7), Forschungszentrum Jülich, 52425 Jülich, GermanyInstitute of Energy and Climate Research: Stratosphere (IEK-7), Forschungszentrum Jülich, 52425 Jülich, GermanyThe variation in tropospheric ozone over East Asia was analyzed using tropospheric column ozone data measured by the Global Ozone Monitoring Experiment (GOME) satellite. An empirical orthogonal function (EOF) analysis was carried out to derive the dominant modes of the variation in the tropospheric ozone volume-mixing ratio (TOVMR). The EOF1 mode, which explained 61.5% of the total variance, showed a same-sign distribution over all of East Asia, with a belt of enhanced ozone concentrations around 40°N. The principal component of EOF1 (PC1) suggested that photochemical ozone production together with Brewer-Dobson circulation and subtropical westerly jet plays important roles in modulating the seasonal variation of the TOVMR; ozone-rich air produced by photochemical processes was transported from the stratosphere to the troposphere by BD circulation and this ozone-rich air was then blocked by the subtropical westerly jet and accumulated north of the jet. The EOF2 mode explained 29.2% of the total variance with an opposite-sign pattern on the north and south side of 35°N. When anticyclonic circulation transported ozone-poor air from the upwelling area over the Bay of Bengal towards the Tibetan Plateau during the onset of the Asian summer monsoon, tropospheric ozone in this region decreased dramatically.http://dx.doi.org/10.1155/2015/879578 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yi Liu Yuli Zhang Yong Wang Chuanxi Liu Zhaonan Cai Paul Konopka Rolf Müller |
spellingShingle |
Yi Liu Yuli Zhang Yong Wang Chuanxi Liu Zhaonan Cai Paul Konopka Rolf Müller Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME Observations Advances in Meteorology |
author_facet |
Yi Liu Yuli Zhang Yong Wang Chuanxi Liu Zhaonan Cai Paul Konopka Rolf Müller |
author_sort |
Yi Liu |
title |
Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME Observations |
title_short |
Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME Observations |
title_full |
Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME Observations |
title_fullStr |
Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME Observations |
title_full_unstemmed |
Dominant Modes of Tropospheric Ozone Variation over East Asia from GOME Observations |
title_sort |
dominant modes of tropospheric ozone variation over east asia from gome observations |
publisher |
Hindawi Limited |
series |
Advances in Meteorology |
issn |
1687-9309 1687-9317 |
publishDate |
2015-01-01 |
description |
The variation in tropospheric ozone over East Asia was analyzed using tropospheric column ozone data measured by the Global Ozone Monitoring Experiment (GOME) satellite. An empirical orthogonal function (EOF) analysis was carried out to derive the dominant modes of the variation in the tropospheric ozone volume-mixing ratio (TOVMR). The EOF1 mode, which explained 61.5% of the total variance, showed a same-sign distribution over all of East Asia, with a belt of enhanced ozone concentrations around 40°N. The principal component of EOF1 (PC1) suggested that photochemical ozone production together with Brewer-Dobson circulation and subtropical westerly jet plays important roles in modulating the seasonal variation of the TOVMR; ozone-rich air produced by photochemical processes was transported from the stratosphere to the troposphere by BD circulation and this ozone-rich air was then blocked by the subtropical westerly jet and accumulated north of the jet. The EOF2 mode explained 29.2% of the total variance with an opposite-sign pattern on the north and south side of 35°N. When anticyclonic circulation transported ozone-poor air from the upwelling area over the Bay of Bengal towards the Tibetan Plateau during the onset of the Asian summer monsoon, tropospheric ozone in this region decreased dramatically. |
url |
http://dx.doi.org/10.1155/2015/879578 |
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